1. What is a gene?

A unit of heredity that carries information for a trait A type of cell found in blood A part of the digestive system A tool used in farming

2. If a tall plant (TT) is crossed with a short plant (tt), and tallness is dominant, what height will the offspring most likely be?

All tall All short Half tall, half short All medium height

3. Which of these best defines a "dominant trait"?

A trait that is hidden and only appears when two recessive genes are present A trait that shows up in an offspring even when only one copy of the gene is inherited A trait passed only from mother to child A trait that never changes across generations

4. Balance this equation: H₂ + O₂ → H₂O. Which of these is correctly balanced?

2H₂ + O₂ → 2H₂O H₂ + O₂ → H₂O H₂ + 2O₂ → H₂O 2H₂ + 2O₂ → H₂O

5. What type of reaction occurs when a substance combines with oxygen?

Reduction Oxidation Neutralisation Precipitation

6. Name the gas produced when a metal reacts with an acid.

Oxygen gas Carbon dioxide gas Hydrogen gas Nitrogen gas

7. Which of these best defines the term "ecosystem"?

A community of only plants in an area All the living and non-living things in an area, interacting with each other A group of animals of the same species The study of rocks and minerals

8. Which of these is an example of how human activities can damage the environment?

Planting trees and recycling waste Deforestation and improper waste disposal Conserving water and using renewable energy Practising crop rotation

9. Deforestation refers to ______, and one of its effects is ______.

Planting more trees; increased rainfall The clearing or cutting down of forests; loss of habitat for animals Farming on hills; improved soil fertility Building dams; flooding of rivers

10. Which of these is a good way to conserve water in the home?

Leaving taps running when not in use Fixing leaking pipes and taps promptly Washing the car every day with a hose Watering the garden at midday under the hot sun